Hydroxylated Graphene: A Promising Reinforcing Nanofiller for Nanoengineered Cement Composites.

ABSTRACT: A very low dosage of graphene oxide (GO) can enhance the mechanical durability of cement composites, but the reinforcing enhancement is highly dependent on the uniform dispersion of graphene in the matrix. Carboxylic groups at GO nanosheets have a decisive effect on GO aggregation in an alkaline cement solution because they have a strong complexation ability with aqueous Ca²⁺ released by cement hydration and subsequently crosslinks the adjacent graphene sheets, causing the immediate coagulation of GO. The available methods of homogeneously dispersing GO in a cement slurry cannot completely eliminate this carboxylic-crosslinking-induced GO coagulation. In this study, many hydroxyl groups were introduced onto the edge and planar nanosheets to prepare water-soluble hydroxylated gra

SUBMITTER: Yang S 

PROVIDER: S-EPMC8600514 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature